<template>
  <div class="wrapper">

    <!-- header部分 -->
    <header>
      <Back>
      </Back>
      <p>&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;</p >
      <p>商家列表</p >
      <p>&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;</p >
    </header>

    <!-- 商家列表部分 -->
    <ul class="business">
      <li v-for="item in businessArr" @click="toBusinessInfo(item.businessId)">
        <div class="business-img">
          <img :src="item.businessImg">
          <div class="business-img-quantity" v-show="item.quantity>0">{{item.quantity}}</div>
        </div>
        <div class="business-info">
          <h3>{{item.businessName}}</h3>
          <p>&#165;{{item.starPrice}}起送 | &#165;{{item.deliveryPrice}}配送</p>
          <p>{{item.businessExplain}}</p>
        </div>
      </li>
    </ul>

    <!-- 底部菜单部分 -->
    <Footer></Footer>

  </div>
</template>

<script>
import Footer from '../components/Footer.vue';
import Back from "@/components/Back.vue";

export default{
  name:'BusinessList',
  data(){
    return {
      orderTypeId: this.$route.query.orderTypeId,
      businessArr:[],
      user:{}
    }
  },
  created() {
    this.user = this.$getSessionStorage('user');

    //根据orderTypeId查询商家信息
			let url = `BusinessController/listBusinessByOrderTypeId/${this.orderTypeId}`;
			this.$axios.get(url).then(response => {
				this.businessArr = response.data.result;
      //判断是否登录
      if (this.user != null) {
        this.listCart();
      }
    }).catch(error => {
      console.error(error);
    });
  },
  components:{
    Back,
    Footer
  },
  methods:{
    listCart(){
				let url = `CartController/listCart/${this.user.userId}`;
				this.$axios.get(url).then(response => {
					let cartArr = response.data.result;
        //遍历所有食品列表
        for(let businessItem of this.businessArr){
          businessItem.quantity = 0;
          for(let cartItem of cartArr){
            if(cartItem.businessId==businessItem.businessId){
              businessItem.quantity += cartItem.quantity;
            }
          }
        }
        this.businessArr.sort();
      }).catch(error=>{
        console.error(error);
      });
    },
    toBusinessInfo(businessId){
      this.$router.push({path:'/businessInfo',query:{businessId:businessId}});
    }
  }
}
</script>

<style scoped>
/****************** 总容器 ******************/
.wrapper {
  width: 100%;
  height: 100%;
}

/****************** header部分 ******************/
.wrapper header {
  width: 100%;
  height: 12vw;
  background-color: #0097FF;
  color: #fff;
  font-size: 4.8vw;

  position: fixed;
  left: 0;
  top: 0;
  z-index: 1000;

  display: flex;
  justify-content: center;
  align-items: center;
}
.wrapper header back{

}
/****************** 商家列表部分 ******************/
.wrapper .business {
  width: 100%;
  margin-top: 12vw;
  padding-bottom: 14vw;
}

.wrapper .business li {
  width: 100%;
  box-sizing: border-box;
  padding: 2.5vw;
  border-bottom: solid 1px #DDD;
  user-select: none;
  cursor: pointer;

  display: flex;
  align-items: center;
}

.wrapper .business li .business-img {
  /*这里设置为相当定位，成为business-img-quantity元素的父元素*/
  position: relative;
}

.wrapper .business li .business-img img {
  width: 20vw;
  height: 20vw;
}

.wrapper .business li .business-img .business-img-quantity {
  width: 5vw;
  height: 5vw;
  background-color: red;
  color: #fff;
  font-size: 3.6vw;
  border-radius: 2.5vw;

  display: flex;
  justify-content: center;
  align-items: center;

  /*设置成绝对定位，不占文档流空间*/
  position: absolute;
  right: -1.5vw;
  top: -1.5vw;
}

.wrapper .business li .business-info {
  margin-left: 3vw;
}

.wrapper .business li .business-info h3 {
  font-size: 3.8vw;
  color: #555;
}

.wrapper .business li .business-info p {
  font-size: 3vw;
  color: #888;
  margin-top: 2vw;
}
</style>
